摘要
选用1060铝合金管件冲击不同表面状态下的AZ31B镁合金表面进行磁脉冲焊接试验。并对焊后接头结合形貌进行量化分析,着重研究焊接接头结合界面间的产热机制。结果表明:设定充电电压为4.2kV不变,焊接接头均表现为波纹状结合;光洁表面试件焊接后界面结合区波峰附近有微量弥散分布的熔化块;粗糙表面焊接后界面结合区出现呈片状连续分布的熔化层。由分析可知:粗糙表面凸起可以捕获更多的射流,并且会阻碍表面波沿表面传递,上述因素导致能量不能及时散失进而结合界面区温度升高最终出现熔化现象。
The magnetic pulse welding （MPW） were carried out with the 1060 Aluminum tube and AZ31 Magnesium alloy bar with different surface conditions. Quantitative analysis of the interface morphology of the obtained Al-Mg MPW joints was conducted. The heat production mechanism during MPW process was studied. The results show the MPW joints interface exhibits wave morphology which is the typical character of high velocity impact welding. The pocket type melting phase is distinguished at the joint interface by Mg bar with the smooth surface. However, the continuous melting layer is found at the joint interface by Mg bar with the rough surface. The bumps on the rough surface can catch more impacting jet, and disturb the transportation of the surface wave, which also block the heat lost process. So the interface temperature rises and the melting layer forms.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2013年第5期998-1002,共5页
Rare Metal Materials and Engineering
基金
教育部博士学科点专项科研基金(20101103110003)
北京市教委科技发展面上项目(KM201210005016)
关键词
磁脉冲焊接
界面
射流
magnetic pulse welding
interface
jet
